Update Lite Reservation

Update a Pub/Sub Lite reservation

Explore further

For detailed documentation that includes this code sample, see the following:

• Create and manage Lite reservations

Code sample

Go

To authenticate to Pub/Sub Lite, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"context"
	"fmt"
	"io"

	"cloud.google.com/go/pubsublite"
)

func updateReservation(w io.Writer, projectID, region, reservationID string, throughputCapacity int) error {
	// projectID := "my-project-id"
	// region := "us-central1"
	// reservationID := "my-reservation-id"
	// throughputCapacity := 8
	ctx := context.Background()
	client, err := pubsublite.NewAdminClient(ctx, region)
	if err != nil {
		return fmt.Errorf("pubsublite.NewAdminClient: %w", err)
	}
	defer client.Close()

	reservationPath := fmt.Sprintf("projects/%s/locations/%s/reservations/%s", projectID, region, reservationID)
	config := pubsublite.ReservationConfigToUpdate{
		Name:               reservationPath,
		ThroughputCapacity: throughputCapacity,
	}
	updatedCfg, err := client.UpdateReservation(ctx, config)
	if err != nil {
		return fmt.Errorf("client.UpdateReservation got err: %w", err)
	}
	fmt.Fprintf(w, "Updated reservation: %#v\n", updatedCfg)
	return nil
}

Java

To authenticate to Pub/Sub Lite, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import com.google.api.gax.rpc.NotFoundException;
import com.google.cloud.pubsublite.AdminClient;
import com.google.cloud.pubsublite.AdminClientSettings;
import com.google.cloud.pubsublite.CloudRegion;
import com.google.cloud.pubsublite.ProjectNumber;
import com.google.cloud.pubsublite.ReservationName;
import com.google.cloud.pubsublite.ReservationPath;
import com.google.cloud.pubsublite.proto.Reservation;
import java.util.concurrent.ExecutionException;

public class UpdateReservationExample {
  public static void main(String... args) throws Exception {
    // TODO(developer): Replace these variables before running the sample.
    long projectNumber = Long.parseLong("123456789");
    String cloudRegion = "your-cloud-region";
    String reservationId = "your-reservation-id";
    // Each unit of throughput capacity supports up to 1 MiB/s of published messages or
    // 2 MiB/s of subscribed messages.
    int throughputCapacity = 8;

    updateReservationExample(projectNumber, cloudRegion, reservationId, throughputCapacity);
  }

  public static void updateReservationExample(
      long projectNumber, String cloudRegion, String reservationId, int throughputCapacity)
      throws Exception {

    ReservationPath reservationPath =
        ReservationPath.newBuilder()
            .setProject(ProjectNumber.of(projectNumber))
            .setLocation(CloudRegion.of(cloudRegion))
            .setName(ReservationName.of(reservationId))
            .build();

    com.google.protobuf.FieldMask fieldMask =
        com.google.protobuf.FieldMask.newBuilder().addPaths("throughput_capacity").build();

    Reservation reservation =
        Reservation.newBuilder()
            .setName(reservationPath.toString())
            .setThroughputCapacity(throughputCapacity)
            .build();

    AdminClientSettings adminClientSettings =
        AdminClientSettings.newBuilder().setRegion(CloudRegion.of(cloudRegion)).build();

    try (AdminClient adminClient = AdminClient.create(adminClientSettings)) {
      Reservation reservationBeforeUpdate = adminClient.getReservation(reservationPath).get();
      System.out.println("Before update: " + reservationBeforeUpdate.getAllFields());

      Reservation reservationAfterUpdate =
          adminClient.updateReservation(reservation, fieldMask).get();
      System.out.println("After update: " + reservationAfterUpdate.getAllFields());
    } catch (ExecutionException e) {
      try {
        throw e.getCause();
      } catch (NotFoundException notFound) {
        System.out.println("This reservation is not found.");
      } catch (Throwable throwable) {
        throwable.printStackTrace();
      }
    }
  }
}

Python

To authenticate to Pub/Sub Lite, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

from google.api_core.exceptions import NotFound
from google.cloud.pubsublite import AdminClient, Reservation
from google.cloud.pubsublite.types import CloudRegion, ReservationPath
from google.protobuf.field_mask_pb2 import FieldMask

# TODO(developer):
# project_number = 1122334455
# cloud_region = "us-central1"
# reservation_id = "your-reservation-id"
# Each unit of throughput capacity supports up to 1 MiB/s of published messages
# or 2 MiB/s of subscribed messages. Must be a positive integer.
# throughput_capacity = 8

cloud_region = CloudRegion(cloud_region)
reservation_path = ReservationPath(project_number, cloud_region, reservation_id)

# Defines which fields to update in the reservation.
field_mask = FieldMask(paths=["throughput_capacity"])

reservation = Reservation(
    name=str(reservation_path), throughput_capacity=throughput_capacity
)

client = AdminClient(cloud_region)
try:
    response = client.get_reservation(reservation_path)
    print(f"Before update: {response}")

    response = client.update_reservation(reservation, field_mask)
    print(f"After update: {response}")
except NotFound:
    print(f"{reservation_path} is not found.")

What's next

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